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Trojan.MulDrop5.6240

Added to the Dr.Web virus database: 2013-12-24

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] '' = ''
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'GrpConv' = 'grpconv -o'
  • [<HKLM>\SOFTWARE\Classes\MSProgramGroup\Shell\Open\Command] '' = '<SYSTEM32>\grpconv.exe %1'
  • [<HKLM>\SOFTWARE\Classes\cmdfile\shell\open\command] '' = '"%1" %*'
  • [<HKLM>\SOFTWARE\Classes\comfile\shell\open\command] '' = '"%1" %*'
  • [<HKLM>\SOFTWARE\Classes\exefile\shell\open\command] '' = '"%1" %*'
  • [<HKLM>\SOFTWARE\Classes\batfile\shell\open\command] '' = '"%1" %*'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
  • System Restore (SR)
Creates and executes the following:
  • 'C:\32788R22FWJFW\grep.cfexe' -F "5.2." OsVer
  • 'C:\32788R22FWJFW\pv.cfexe' -kf n.com
  • 'C:\32788R22FWJFW\swreg.exe' QUERY "HKLM\SYSTEM\CURRENTCONTROLSET\CONTROL\PRODUCTOPTIONS" /v ProductType
  • 'C:\32788R22FWJFW\grep.cfexe' -F "5.1.2" OsVer
  • 'C:\32788R22FWJFW\pev.exe' uzip "32788R22FWJFW\License\pv_5_2_2.zip" "32788R22FWJFW\License"
  • '<SYSTEM32>\cmd.execf' /c 32788R22FWJFW\prep.cmd >\Bug.txt 2>&1
  • 'C:\32788R22FWJFW\pv.exe' -kf n.com
  • '<SYSTEM32>\cmd.execf' /c 32788R22FWJFW\prep.cmd
  • 'C:\32788R22FWJFW\grep.cfexe' -isq "ProductType.*WinNT" WinNT00
  • 'C:\32788R22FWJFW\pev.cfexe' -rtf --c:##5# .\* and { License.exe or 32788R22FWJFW.exe or OsVer.exe or WinNT.exe or N_.exe }
  • 'C:\32788R22FWJFW\n.com' win close ititle "ComboFix"
  • 'C:\32788R22FWJFW\pev.cfexe' -tf --files:files.pif --c:##5#b#f#
  • 'C:\32788R22FWJFW\pev.cfexe' -rtf -md554463D66BF8F932DEA4D9354873FC471 .\md5sum.pif
  • 'C:\32788R22FWJFW\pev.exe' -rtf -s+901 .\OriPath00
  • 'C:\32788R22FWJFW\sed.cfexe' "/^PATH=/I!d; s///; s/\x22//g" Oripath
  • 'C:\32788R22FWJFW\n.com' win close class "#32770"
  • 'C:\32788R22FWJFW\pv.cfexe' -kf runonce.exe grpconv.exe procmon.exe
  • 'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Command Processor" /reset /q
  • 'C:\32788R22FWJFW\hidec.exe' 32788R22FWJFW\swreg.exe import 32788R22FWJFW\EXE.reg
  • 'C:\32788R22FWJFW\n.com' exec hide 32788R22FWJFW\SWREG.exe acl "hklm\software\microsoft\windows nt\currentversion\windows" /O Guest /Q
  • 'C:\32788R22FWJFW\swreg.exe' import 32788R22FWJFW\EXE.reg
  • 'C:\32788R22FWJFW\hidec.exe' 32788R22FWJFW\swreg.exe acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32" /da:r /q
  • 'C:\32788R22FWJFW\n.com' shexec install 32788R22FWJFW\Prep.inf
  • 'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32" /da:r /q
  • 'C:\32788R22FWJFW\hidec.exe' 32788R22FWJFW\swreg.exe acl "HKLM\SOFTWARE\Microsoft\Command Processor" /reset /q
  • 'C:\32788R22FWJFW\swreg.exe' acl "hklm\software\microsoft\windows nt\currentversion\windows" /O Guest /Q
  • 'C:\32788R22FWJFW\n.com' cmdwait 1000 exec hide "~$folder.system$\cmd.execf" /c 32788R22FWJFW\prep.cmd >\Bug.txt 2>&1
  • 'C:\32788R22FWJFW\gsar.cfexe' -if -s\:000M:000i:000c:000r:000o -r\:001M:000i:000c:000r:000o "<SYSTEM32>\cmd.exe" "<SYSTEM32>\cmd.execf"
  • 'C:\32788R22FWJFW\swreg.exe' acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32" /reset /q
  • 'C:\32788R22FWJFW\n.com' cmdwait 2500 exec hide "~$folder.system$\cmd.execf" /c 32788R22FWJFW\prep.cmd
  • 'C:\32788R22FWJFW\n.com' cmdwait 3000 exec hide 32788R22FWJFW\swreg.exe acl "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32" /reset /q
  • 'C:\32788R22FWJFW\n.com' cmdwait 150 exec hide 32788R22FWJFW\SWREG.exe acl "hklm\software\microsoft\windows nt\currentversion\windows" /DE:F /Q
  • 'C:\32788R22FWJFW\n.com' exec hide 32788R22FWJFW\GSAR.cfexe -if -s\:000M:000i:000c:000r:000o -r\:001M:000i:000c:000r:000o "~$folder.system$\cmd.exe" "~$folder.system$\cmd.execf"
  • 'C:\32788R22FWJFW\swreg.exe' acl "hklm\software\microsoft\windows nt\currentversion\windows" /DE:F /Q
Executes the following:
  • '<SYSTEM32>\grpconv.exe' -o
  • '<SYSTEM32>\runonce.exe' -r
  • '<SYSTEM32>\rundll32.exe' setupapi,InstallHinfSection DefaultInstall 132 C:\32788R22FWJFW\Prep.inf
Modifies file system :
Creates the following files:
  • C:\32788R22FWJFW\rogues.dat
  • C:\32788R22FWJFW\region.dat
  • C:\32788R22FWJFW\safeboot.def.dat
  • C:\32788R22FWJFW\safeboot.dat
  • C:\32788R22FWJFW\RCLink.dat
  • C:\32788R22FWJFW\NetworkService.dat
  • C:\32788R22FWJFW\netsvc.xp.dat
  • C:\32788R22FWJFW\Purity.dat
  • C:\32788R22FWJFW\Policies.dat
  • C:\32788R22FWJFW\w2kreg.dat
  • C:\32788R22FWJFW\vistareg.dat
  • C:\32788R22FWJFW\zDomain.dat
  • C:\32788R22FWJFW\xpreg.dat
  • C:\32788R22FWJFW\system_ini.dat
  • C:\32788R22FWJFW\svc_wht.dat
  • C:\32788R22FWJFW\safeboot.def.vista.dat
  • C:\32788R22FWJFW\svchost.vista.dat
  • C:\32788R22FWJFW\svchost.dat
  • C:\32788R22FWJFW\023.dat
  • C:\32788R22FWJFW\NirCmd.chm
  • C:\32788R22FWJFW\Creg.dat
  • C:\32788R22FWJFW\023v.dat
  • C:\32788R22FWJFW\zip.cfexe
  • C:\32788R22FWJFW\swsc.cfexe
  • C:\32788R22FWJFW\setpath.cfexe
  • C:\32788R22FWJFW\tail.cfexe
  • C:\32788R22FWJFW\swxcacls.cfexe
  • C:\32788R22FWJFW\netsvc.bad.dat
  • C:\32788R22FWJFW\ndis_combofix.dat
  • C:\32788R22FWJFW\netsvc.vista.dat
  • C:\32788R22FWJFW\netsvc.dat
  • C:\32788R22FWJFW\LocalSystemNetworkRestricted.dat
  • C:\32788R22FWJFW\Fin.dat
  • C:\32788R22FWJFW\CregC.dat
  • C:\32788R22FWJFW\LocalServiceNetworkRestricted.dat
  • C:\32788R22FWJFW\LocalService.dat
  • C:\32788R22FWJFW\zhsvc.dat
  • C:\32788R22FWJFW\License\streamtools.zip
  • C:\32788R22FWJFW\License\pv_5_2_2.zip
  • C:\Bug.txt
  • <SYSTEM32>\cmd.execf
  • C:\32788R22FWJFW\image001.gif
  • C:\32788R22FWJFW\restore_pt.vbs
  • C:\32788R22FWJFW\OSid.vbs
  • C:\32788R22FWJFW\Wmi_rem.vbs
  • C:\32788R22FWJFW\SvcDrv.vbs
  • C:\32788R22FWJFW\OriPath
  • C:\32788R22FWJFW\WinNT00
  • C:\32788R22FWJFW\mdCheck00.dat
  • C:\32788R22FWJFW\OriPath00
  • C:\32788R22FWJFW\OsVer
  • C:\32788R22FWJFW\License\pv.txt
  • C:\32788R22FWJFW\License\pv.exe
  • C:\32788R22FWJFW\Nircmd.com
  • C:\32788R22FWJFW\pev.cfexe
  • C:\32788R22FWJFW\md5sum.pif
  • C:\32788R22FWJFW\files.pif
  • C:\32788R22FWJFW\Exe.reg
  • C:\32788R22FWJFW\md5sum00.pif
  • C:\32788R22FWJFW\srizbi.md5
  • C:\32788R22FWJFW\ERDNTDOS.LOC
  • C:\32788R22FWJFW\ERDNT.e_e
  • C:\32788R22FWJFW\ERUNT.LOC
  • C:\32788R22FWJFW\ERDNTWIN.LOC
  • C:\32788R22FWJFW\DPF.str
  • C:\32788R22FWJFW\toolbar.sed
  • C:\32788R22FWJFW\lnkread.vbs
  • C:\32788R22FWJFW\av.vbs
  • C:\32788R22FWJFW\run2.sed
  • C:\32788R22FWJFW\embedded.sed
  • C:\32788R22FWJFW\ddsDo.sed
  • C:\32788R22FWJFW\RegDo.sed
  • C:\32788R22FWJFW\REGDACL.sed
  • C:\32788R22FWJFW\sed.cfexe
  • C:\32788R22FWJFW\SetEnvmt.bat
  • C:\32788R22FWJFW\SafeBootRepair.bat
  • C:\32788R22FWJFW\Auto-RC.cmd
  • C:\32788R22FWJFW\Assoc.cmd
  • C:\32788R22FWJFW\RestoreO4.bat
  • C:\32788R22FWJFW\List.bat
  • C:\32788R22FWJFW\List-D.bat
  • C:\32788R22FWJFW\ND_.bat
  • C:\32788R22FWJFW\MoveIt.bat
  • C:\32788R22FWJFW\CregC.cmd
  • C:\32788R22FWJFW\Create.cmd
  • C:\32788R22FWJFW\FD-SV.cmd
  • C:\32788R22FWJFW\CSet.cmd
  • C:\32788R22FWJFW\CF-Script.cmd
  • C:\32788R22FWJFW\AWF.cmd
  • C:\32788R22FWJFW\av.cmd
  • C:\32788R22FWJFW\Catch-sub.cmd
  • C:\32788R22FWJFW\Boot-Rk.cmd
  • C:\32788R22FWJFW\License\UnxUtilsDist.html
  • C:\32788R22FWJFW\License\Zip - license.txt
  • C:\32788R22FWJFW\c.bat
  • C:\32788R22FWJFW\Boot.bat
  • C:\32788R22FWJFW\License\mtee.txt.txt
  • C:\32788R22FWJFW\License\dumphive-license.txt
  • C:\32788R22FWJFW\License\Curl - license.txt
  • C:\32788R22FWJFW\License\FI - license.txt
  • C:\32788R22FWJFW\License\EXTRACT.TXT
  • C:\32788R22FWJFW\Lang.bat
  • C:\32788R22FWJFW\Kollect.bat
  • C:\32788R22FWJFW\List-C.bat
  • C:\32788R22FWJFW\List-B.bat
  • C:\32788R22FWJFW\history.bat
  • C:\32788R22FWJFW\DelClsid.bat
  • C:\32788R22FWJFW\Combobatch.bat
  • C:\32788R22FWJFW\FIXLSP.bat
  • C:\32788R22FWJFW\FIND3M.bat
  • C:\32788R22FWJFW\FKMGen.cmd
  • C:\32788R22FWJFW\ComboFix-Download.cfexe
  • C:\32788R22FWJFW\catchme.cfexe
  • C:\32788R22FWJFW\dumphive.cfexe
  • C:\32788R22FWJFW\dd.cfexe
  • C:\32788R22FWJFW\appinit.bad
  • C:\32788R22FWJFW\BootSect.dll
  • C:\32788R22FWJFW\swreg.exe
  • C:\32788R22FWJFW\Combo-Fix.sys
  • C:\32788R22FWJFW\ffdefstr.dll
  • C:\32788R22FWJFW\mtee.cfexe
  • C:\32788R22FWJFW\moveex.cfexe
  • C:\32788R22FWJFW\NirCmdC.cfexe
  • C:\32788R22FWJFW\NirCmd.cfexe
  • C:\32788R22FWJFW\handle.cfexe
  • C:\32788R22FWJFW\extract.cfexe
  • C:\32788R22FWJFW\ERUNT.cfexe
  • C:\32788R22FWJFW\gsar.cfexe
  • C:\32788R22FWJFW\grep.cfexe
  • C:\32788R22FWJFW\RegScan.cmd
  • C:\32788R22FWJFW\Prep.cmd
  • C:\32788R22FWJFW\SnapShot.cmd
  • C:\32788R22FWJFW\Rkey.cmd
  • C:\32788R22FWJFW\NT-OS.cmd
  • C:\32788R22FWJFW\Install-RC.cmd
  • C:\32788R22FWJFW\GetHive.cmd
  • C:\32788R22FWJFW\Kill-All.cmd
  • C:\32788R22FWJFW\katch.cmd
  • C:\32788R22FWJFW\n.com
  • C:\32788R22FWJFW\Prep.inf
  • C:\32788R22FWJFW\pev.exe
  • C:\32788R22FWJFW\hidec.exe
  • C:\32788R22FWJFW\clsid.c
  • C:\32788R22FWJFW\SuppScan.cmd
  • C:\32788R22FWJFW\SRestore.cmd
  • C:\32788R22FWJFW\badclsid.c
  • C:\32788R22FWJFW\Update-CF.cmd
Deletes the following files:
  • C:\32788R22FWJFW\OriPath
  • C:\32788R22FWJFW\OriPath00
  • C:\32788R22FWJFW\WinNT00
  • C:\32788R22FWJFW\md5sum00.pif
Moves the following files:
  • from C:\32788R22FWJFW\pv.exe to C:\32788R22FWJFW\pv.cfexe
  • from C:\32788R22FWJFW\License\pv.exe to C:\32788R22FWJFW\pv.exe
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: '(null)'
  • ClassName: 'EDIT' WindowName: '(null)'

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